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shottheradio wrote:The scallops made by running water in a cave on the walls.....
how do you read them,....which way indicates the direction the water was following at one point?
shottheradio wrote:The steep side is up stream,.. and the more graduale incline is down stream?
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I always thought it was the other way round, as per Weevil.driggs wrote:You have it backwards. The steep side is downstream, the gradual side is upstream.
ian mckenzie wrote:They are asymmetrical in cross section, having a steep wall on the upstream side and a gentler slope on the downstream side.
A section taken through the crests [of a scallop] transverse to the flow direction always shows that the downstream slope is steeper than the upstream.
The direction of the water flow that formed the scallops is indicated by their steep sides, which face in the downstream direction.
The longitudinal profile of scallops and flutes always has the steepest side facing downstream.
driggs wrote:
OK, I even dug out Rane Curl's "classic" paper from the 1974 NSS bulletin, Deducing Flow Velocity in Cave Conduits from Scallops... Rane introduces things by talking about "turbulent jet flow" and then referring to a diagram, which shows the steep side on the downstream side.
Convinced yet?
driggs wrote:Convinced yet?
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